<!doctype html>
<html>
  <head>
    <style>
      html,
      body {
        width: 100%;
        height: 100%;
      }
      iframe {
        border: 1px black solid;
        display: flex;
        width: 90%;
        height: 600px;
      }
    </style>
  </head>
  <body>
    <iframe
      src="http://localhost:8020/index-sandbox.html"
      sandbox="allow-scripts allow-modals allow-forms allow-same-origin allow-downloads"
    ></iframe>
  </body>
</html>
